CN111207446A - Hot air supply system and control method thereof - Google Patents
Hot air supply system and control method thereof Download PDFInfo
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- CN111207446A CN111207446A CN202010020063.9A CN202010020063A CN111207446A CN 111207446 A CN111207446 A CN 111207446A CN 202010020063 A CN202010020063 A CN 202010020063A CN 111207446 A CN111207446 A CN 111207446A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000001939 inductive effect Effects 0.000 claims abstract description 23
- 230000000694 effects Effects 0.000 claims abstract description 15
- 238000009423 ventilation Methods 0.000 claims description 36
- 238000007664 blowing Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims 2
- 238000004378 air conditioning Methods 0.000 abstract description 19
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- 238000004088 simulation Methods 0.000 description 12
- 238000009792 diffusion process Methods 0.000 description 8
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- 210000003128 head Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 210000004877 mucosa Anatomy 0.000 description 4
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- 238000010438 heat treatment Methods 0.000 description 3
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- 230000007423 decrease Effects 0.000 description 2
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- 239000012080 ambient air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
- F24F2120/12—Position of occupants
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a hot air supply system and a control method thereof, wherein the system comprises: the method comprises the following steps: the indoor air-conditioning unit is assembled on an indoor wall, an air return opening of the indoor air-conditioning unit is communicated with an indoor space, an air outlet of the indoor air-conditioning unit is assembled and connected with an air inducing pipe assembly, and an extension line of an outlet of the air inducing pipe assembly is perpendicular to the indoor ground; in a working state, air flow sent out by the indoor unit of the air conditioner is sent out through the air inducing pipe assembly, wall type air supply air flow is formed along the wall of the indoor unit, and the wall type air supply air flow is diffused to form a hot air lake after touching the indoor ground. The invention solves the problem that the upper air supply mode in the prior art is difficult to supply hot air to personnel space. The hot air can be directly sent to the lower part of the room with low loss, the rising of hot air flow is effectively inhibited, and the good extending and diffusing effect of the hot air flow in the horizontal direction is ensured.
Description
Technical Field
The invention relates to the field of heating ventilation, in particular to a hot air supply system and a control method thereof, which are particularly suitable for residential office building spaces.
Background
In winter, a heating unit is adopted for heating, a good air flow organization needs to be established, and the form of the air flow organization is an important factor influencing the indoor ventilation and air conditioning effects of a building and determines the distribution of fresh air, cold and heat, humidity and indoor pollutant concentration fed into the building. Reasonable airflow organization should be based on consuming less energy, effectively improve indoor air quality, create comfortable hot and humid environment, and can effectively eliminate the sense of blowing at the same time.
The pattern of airflow patterns is divided into two categories: conventional mixing ventilation based on dilution principle (fig. 1); modern displacement ventilation (fig. 2) powered by buoyancy control.
The traditional mixed ventilation air conditioner based on the dilution principle has the common problem that the indoor vertical temperature gradient is too large in winter, and the head is too high in temperature and the feet are cold. Secondly, the working area of mixed ventilation is generally in the environment of return air or exhaust air, and the sanitary condition is relatively poor. Finally, the unreasonable air flow organization has poor ventilation efficiency, reduces the energy utilization rate, and is not beneficial to energy conservation.
And when the replacement ventilation is used for the hot-blast operating mode of air supply, because of the system air supply speed is lower relatively (0.1 ~ 0.3m/s), when air supply temperature is higher than ambient air temperature, the air current will rise uniformly in the active area, does not diffuse, can draw the conclusion from this: displacement ventilation can be effectively applied only when the supply air temperature is lower than the indoor air temperature.
Disclosure of Invention
The invention aims to provide a hot air supply system and a control method thereof, and the system solves the problem that the air supply mode in the prior art is difficult to supply hot air to personnel space; the hot air can be directly sent to the lower part of the room with low loss, the rising of hot air flow is effectively inhibited, and the good extending and diffusing effect of the hot air flow in the horizontal direction is ensured.
In order to achieve the above object, the present invention provides a hot air supply system, comprising: the indoor air-conditioning unit is assembled on an indoor wall, an air return opening of the indoor air-conditioning unit is communicated with an indoor space, an air outlet of the indoor air-conditioning unit is assembled and connected with an air inducing pipe assembly, and an extension line of an outlet of the air inducing pipe assembly is perpendicular to the indoor ground;
in a working state, air flow sent out by the indoor unit of the air conditioner is sent out through the air inducing pipe assembly, wall type air supply air flow is formed along the wall of the indoor unit, and the wall type air supply air flow is diffused to form a hot air lake after touching the indoor ground.
Compared with the existing air-conditioning indoor unit, the air-conditioning indoor unit has the advantages that hot air is supplied in winter, and the nasal mucosa and the cavity mucosa of people are dry due to direct blowing of hot air; and because the hot air is blown out, the air directly rises to the upper part of the room, so that the temperature difference problem of the whole space is caused, namely the problem of large vertical temperature difference of the feet and the head and the feet is caused;
the hot air generated by the indoor unit of the air conditioner is guided and sprayed to the indoor ground through the additionally arranged air guide pipe assembly, and meanwhile, the hot air is diffused along the indoor ground and then rises to the upper part of the indoor space, so that the temperature difference of the whole space is relatively small, and people belong to a relatively comfortable environment;
the hot air lake further formed by diffusion on the indoor ground ensures the comfort of the user, is far away from the indoor unit of the air conditioner, and also enjoys good indoor environment.
In conclusion, the existence of the induced draft tube assembly reduces the air supply height, enhances the suppression of the rise of hot air flow and simultaneously does not occupy too much room use space.
In a preferred embodiment of the invention, the draft tube assembly is mounted in the upper region of any wall within the chamber.
The specific assembly position of the air inducing pipe assembly is provided, and the air inducing pipe assembly fills the whole indoor space with hot air generated by an indoor unit of the air conditioner, so that the air inducing pipe assembly is arranged in an area above the central position of a wall, and the assembly space is saved; secondly, the hot air diffusion efficiency can be improved and rapidly increased, and the two sides and the bottom of the central area are heated more uniformly.
In addition, the air guiding pipe is arranged in the upper area of the central position, so that no shielding object is arranged around the air guiding pipe assembly, the assembly is convenient, and the air guiding pipe is not shielded in the use process, and the air flow is guided to move better.
In a preferred embodiment of the invention, the air inducing pipe assembly adopts a ventilating duct, the ventilating duct is of a telescopic structure, and the distance between the outlet part of the ventilating duct and the indoor floor is adjusted to be 1.1-3 m.
Adopt scalable structure, can adjust the distance of exit portion and indoor ground of air pipe according to actual need because under different space conditions, under different wind speed regulation, if reach better hot-blast diffusion efficiency, adopt suitable distance to be more crucial.
The hot air attaching distance of the air lake region is adjusted by adjusting the height of the air supply outlet from the ground, and the relationship between the hot air attaching distance x of the air lake region and the height h of the air supply outlet is as follows: x is 7.5 x h (-0.8), h is from [1.1,3 ]](R20.99, where R2 is a deterministic coefficient, a statistic that measures fitness, R2The closer the value of (d) is to 1, the better the curve fit. )
After the air supply jet flow is attached to the wall surface, the air flow continuously flows downwards along the wall surface and extends to the ground, the adverse pressure gradient is increased, the jet flow main body is separated from the vertical wall surface, and the jet flow main body and the vertical wall surface impact the ground and then extend forwards along the floor in a radiation flow mode to form an 'air lake area'.
In a preferred embodiment of the invention, the vertical distance between the central axis of the ventilation duct and the indoor wall is S, and the ratio of the width d of the air supply outlet of the ventilation duct to the width d of the air supply outlet of the ventilation duct satisfies 0.5-2 of S/d. The design enables the air flow to form wall-type air supply air flow attached to the indoor wall, further reduces the mixing amount of the air flow and indoor polluted air or cold air, and improves the quality of the air supply. The sticking effect decreases with increasing s/d value. The vertical distance between the central axis of the ventilation pipeline and the indoor wall is S, the width d of the air supply outlet of the ventilation pipeline can form approximate whole-course attached jet flow when S/d is less than 2, and the minimum value of S/d is 0.5, so that the suggestion that S/d is more than or equal to 0.5 and less than or equal to 2 is met.
In a preferred embodiment of the present invention, the ventilation duct includes a rectangular tube, and one end of the tube is connected to the air outlet of the indoor unit of the air conditioner through an elbow.
The elbow is designed, so that the air flow sent out from the air outlet of the original air conditioner indoor unit can be conveniently changed in the air flow flowing direction; and simultaneously, the air conditioner indoor unit is also used as a mechanical connecting part for assembling the air conditioner indoor unit and the ventilation pipeline.
A hot air supply control method, comprising:
acquiring the distance between a current user and a blowing port of an indoor unit of an air conditioner, and setting the distance as L;
acquiring the activity time of the current user in an activity area, and setting the activity time as t;
and sending the numerical values of the distance L and the time t to a controller, and dynamically adjusting the height h of an outlet of the induced draft tube assembly from the indoor ground by the controller according to the obtained values.
In a preferred embodiment of the present invention, an adjustment model of the distance L and the height h is established, where h is (L/7.5) ^ (1.25).
The adjusting model is obtained based on numerical simulation, the hot air adhesion distance x of the air lake region under different air supply heights h is obtained through simulation, the relational expression of x and h is obtained through fitting in origin software, and the relational expression of the distance L between the current user and the air outlet of the air conditioner indoor unit to be controlled and the height h of the air outlet is obtained through back-deduction, wherein the relational expression of the distance L between the current user and the air outlet of the air conditioner indoor unit to be controlled is h (L/7.5) ^ 1.25.
In a preferred embodiment of the invention, when t > t1, the current distance L is fed back to the controller and is recorded as x0, the h value for initiating the adjusting action last time is recorded as x1, and when x0< x1, the induced duct assembly rotates upwards; when x0 is larger than x1, the induced duct assembly rotates in a downward translation mode; when x0 is x1, the induced duct assembly is kept still; when t is less than or equal to t1, the h value is not fed back to the controller.
Further, the value of t1 is 3min < t1<5min, wherein the value of t1 is 3min, 3.5min, or 4min, 5min and the like can be selected, and the setting is specifically carried out according to the actual requirement; the purpose of setting the time is to adjust the height of the outlet of the induced draft pipe assembly from the indoor ground by matching with the controller at any time within a certain time, so that the optimal utilization of energy is better realized.
In the specific working process, human body recognition inductor 6 responds to human body apart from the position L in wind gap and moves time t apart from the human body last time, feed back controller (singlechip) 7 with x, the built-in procedure h of controller ═ x/7.5) ^ (-1.25), it feeds back driver 8 to reach the h value, driver 8 control step motor 9 rolling bearing 10, bearing 10's rotation drives corrugated hose 11's height, the adjustment supply-air outlet is for h apart from ground height, then satisfy the requirement that attached distance is x.
Specifically, the corrugated hose 11 is 1.2m high from the ground in a natural vertical state.
When t is>At t1, the current x is fed back to the controller 7 and is marked as x0. Noting the value of x for the last time the adjustment was initiated as x1。
When x is0<x1When the bearing 10 rotates to the left, the induced duct assembly is kept still when x0 is x1, and when x is0>x1At this time, the bearing 10 rotates rightward.
When t ≦ t1, the value of x is not fed back to the controller 7.
the value of t1 is 3min < t1<5 min.
Compared with the prior art, the invention has the beneficial effects that:
compared with the traditional top side air supply, the air conditioner has the advantages that the rising of hot air flow is favorably inhibited, the hot air of the air conditioner is furthest sent to a working area (an area where a user is located) in winter, the attaching length is longer, the problems that the hot air is difficult to be sent to feet and the vertical temperature difference of the head and the feet is large in winter are solved, meanwhile, the freshness, the oxygen content and the cleanliness of the air in the working area are ensured, the health of personnel is facilitated, and the problems that the nasal mucosa and the cavity mucosa of the personnel are dry and the like caused by the direct blowing of the hot air are.
In addition, the invention realizes the energy-saving requirement of the air supply system of the air conditioner, the coverage of the formed hot air pool is wider, the air freshness and the comfort of all working areas are ensured, and the energy consumption of the air conditioner is reduced.
Drawings
FIG. 1 illustrates a first prior art gas flow diffusion method;
FIG. 2 is a second prior art gas flow diffusion method;
FIG. 3A is a first schematic view of the present invention for effectively suppressing hot gas flow from rising; FIG. 3B is a second schematic diagram of the efficient hot gas flow ramp suppression of the present invention, and FIG. 3C is a third schematic diagram of the efficient hot gas flow ramp suppression of the present invention;
FIG. 4 is an assembly schematic of the system of the present invention;
FIG. 5 is a diagram of the operating state of the system of the present invention;
FIG. 6 is a schematic diagram of various parameters of the system of the present invention;
FIG. 7 is a detailed assembly structure view of the indoor air conditioner of the present invention;
FIG. 8 is a first view showing the operation state of the indoor air conditioner according to the present invention;
FIG. 9 is a second view showing the operation state of the indoor air conditioner according to the present invention;
FIG. 10 is a graph showing the relationship between the attachment distance x and the height h according to the present invention;
FIG. 11 is a graph showing the relationship between the attachment distance x and the height h according to the embodiment of the present invention;
FIG. 12 is a simulated cloud of temperature in the environment of example 4 of the present invention;
FIG. 13 is a simulated cloud of temperatures in example 4 of the present invention (no wall-forming supply airflow);
FIG. 14 is a simulated cloud of temperature in the environment of example 5 of the present invention;
FIG. 15 is a simulated cloud of temperature in the environment of example 6 of the present invention;
FIG. 16 is a simulated cloud of temperature in the environment of example 7 of the present invention;
FIG. 17 is a simulated cloud of temperature in the environment of example 8 of the present invention;
FIG. 18 is a simulated cloud of temperature in the environment of example 9 of the present invention;
FIG. 19 is a simulated cloud of temperature in the environment of example 10 of the present invention;
FIG. 20 is a simulated cloud of temperature in the environment of example 11 of the present invention;
fig. 21 is a simulated cloud of temperature in the environment of example 12 of the present invention.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
A hot air supply system, comprising: the indoor air-conditioning unit is assembled on an indoor wall, an air return opening of the indoor air-conditioning unit is communicated with an indoor space, an air outlet of the indoor air-conditioning unit is assembled and connected with an air inducing pipe assembly, and an extension line of an outlet of the air inducing pipe assembly is perpendicular to the indoor ground; in a working state, air flow sent out by the indoor unit of the air conditioner is sent out through the air inducing pipe assembly, wall type air supply air flow is formed along the wall of the indoor unit, and the wall type air supply air flow is diffused to form a hot air lake after touching the indoor ground.
Compared with the existing air-conditioning indoor unit, the air-conditioning indoor unit has the advantages that hot air is supplied in winter, and the nasal mucosa and the cavity mucosa of people are dry due to direct blowing of hot air; and because the hot air is blown out, the air directly rises to the upper part of the room, so that the temperature difference problem of the whole space is caused, namely the problem of large vertical temperature difference of the feet and the head and the feet is caused; the hot air generated by the indoor unit of the air conditioner is guided and sprayed to the indoor ground through the additionally arranged air guide pipe assembly, and meanwhile, the hot air is diffused along the indoor ground and then rises to the upper part of the indoor space, so that the temperature difference of the whole space is relatively small, and people belong to a relatively comfortable environment; the hot air lake further formed by diffusion on the indoor ground ensures the comfort of the user, is far away from the indoor unit of the air conditioner, and also enjoys good indoor environment.
The formed hot air lake can directly send hot air to the lower part of a room with low loss and effectively inhibit the rising of hot air flow, because the flow velocity of the air supply jet flow close to the side wall is large, the static pressure is small, and the static pressure far away from the side wall is large, so that the air supply jet flow is bent towards the side wall under the action of the pressure difference and is attached to the wall (see the following figures 3a, 3b and 3 c). Compared with mixed ventilation, the entrainment of the supply air flow to the indoor air is smaller than that of the mixed ventilation, so that the speed attenuation of the supply air flow is reduced, and the resistance effect on hot air buoyancy is stronger. In the invention, an air supply pipeline is further added, the air supply height is reduced, the entrainment of the air supply jet flow is further reduced, the speed attenuation of the air supply jet flow is slowed down, and the rising of hot air flow is inhibited.
Example 1:
referring to fig. 4 and 5, in the present embodiment, a hot air supply system includes: the indoor air-conditioning unit 4 is assembled on an indoor wall, an air return opening 5 of the indoor air-conditioning unit is communicated with an indoor space, an air outlet 1 of the indoor air-conditioning unit is assembled and connected with an air inducing pipe assembly, and an extension line of an outlet of the air inducing pipe assembly is perpendicular to the indoor ground; in a working state, air flow sent out by the indoor unit of the air conditioner is sent out through the air inducing pipe assembly, wall type air supply air flow is formed along the wall of the indoor unit, and the wall type air supply air flow is diffused to form a hot air lake after touching the indoor ground.
Compared with the existing air-conditioning indoor unit, the air-conditioning indoor unit has the advantages that hot air is supplied in winter, and the nasal mucosa and the cavity mucosa of people are dry due to direct blowing of hot air; and because the hot air is blown out, the air directly rises to the upper part of the room, so that the temperature difference problem of the whole space is caused, namely the problem of large vertical temperature difference of the feet and the head and the feet is caused;
the hot air generated by the indoor unit of the air conditioner is guided and sprayed to the indoor ground through the additionally arranged air guide pipe assembly, and meanwhile, the hot air is diffused along the indoor ground and then rises to the upper part of the indoor space, so that the temperature difference of the whole space is relatively small, and people belong to a relatively comfortable environment; the hot air lake further formed by diffusion on the indoor ground ensures the comfort of the user, is far away from the indoor unit of the air conditioner, and also enjoys good indoor environment.
In conclusion, the existence of the induced draft tube assembly reduces the air supply height, enhances the suppression of the rise of hot air flow and simultaneously does not occupy too much room use space.
Further, the draft tube assembly is mounted in the upper region of any wall within the chamber. The specific assembly position of the air inducing pipe assembly is provided, and the air inducing pipe assembly fills the whole indoor space with hot air generated by an indoor unit of the air conditioner, so that the air inducing pipe assembly is arranged in an area above the central position of a wall, and the assembly space is saved; secondly, the hot air diffusion efficiency can be improved and rapidly increased, and the two sides and the bottom of the central area are heated more uniformly.
In addition, the air guiding pipe is arranged in the upper area of the central position, so that no shielding object is arranged around the air guiding pipe assembly, the assembly is convenient, and the air guiding pipe is not shielded in the use process, and the air flow is guided to move better.
Furthermore, the air inducing pipe assembly adopts a ventilating duct 2, the ventilating duct 2 is of a telescopic structure, and the distance between the outlet part of the ventilating duct and the indoor floor is adjusted to be 1.1-3 m. The ventilation pipeline 2 can be connected with an indoor air conditioner 4 by adopting an elbow pipe 3.
The ventilation pipeline 2 adopts a telescopic structure, the distance between the outlet part of the ventilation pipeline and the indoor ground can be adjusted according to actual needs, and due to the fact that under different space conditions and different wind speeds, if better hot air spreading efficiency is achieved, the adoption of a proper distance is more critical.
Example 2:
in this embodiment, the hot air adhesion distance in the air lake region is adjusted by adjusting the height of the air supply outlet from the ground, and the relationship between the hot air adhesion distance x in the air lake region and the height h of the air supply outlet is as follows: x is 7.5 x h (-0.8), h is from [1.1,3 ]](R20.99, where R2 is a deterministic coefficient, a statistic that measures fitness, R2The closer the value of (d) is to 1, the better the curve fit. )
After the air supply jet flow is attached to the wall surface, the air flow continuously flows downwards along the wall surface and extends to the ground, the adverse pressure gradient is increased, the jet flow main body is separated from the vertical wall surface, and the air flow main body is forwards extended along the floor in a radiation flow mode after impacting the ground to form an 'air lake area' (a side area corresponding to the impact area). (see FIG. 6 below)
Referring to fig. 6, the vertical distance between the central axis of the ventilation duct and the indoor wall is S, and the ratio of the width d of the air supply opening of the ventilation duct to the width d of the air supply opening satisfies 0.5-2 of S/d. The design enables the air flow to form wall-type air supply air flow attached to the indoor wall, further reduces the mixing amount of the air flow and indoor polluted air or cold air, and improves the quality of the air supply. The sticking effect decreases with increasing s/d value. The vertical distance between the central axis of the ventilation pipeline and the indoor wall is S, the width d of the air supply outlet of the ventilation pipeline can form approximate whole-course attached jet flow when S/d is less than 2, and the minimum value of S/d is 0.5, so that the suggestion that S/d is more than or equal to 0.5 and less than or equal to 2 is met.
Example 3:
based on the technical solutions described in example 1 and example 2.
The ventilating duct 2 comprises a rectangular pipe body, and one end of the pipe body is connected with an air outlet of the indoor unit of the air conditioner through an elbow 3. The elbow is designed, so that the air flow sent out from the air outlet of the original air conditioner indoor unit can be conveniently changed in the air flow flowing direction; and simultaneously, the air conditioner indoor unit is also used as a mechanical connecting part for assembling the air conditioner indoor unit and the ventilation pipeline.
Based on the description of embodiment 1, embodiment 2, and embodiment 3, a hot air supply control method includes:
acquiring the distance between a current user and a blowing port of an indoor unit of an air conditioner, and setting the distance as L;
acquiring the activity time of the current user in an activity area, and setting the activity time as t;
and sending the numerical values of the distance L and the time t to a controller, and dynamically adjusting the height h of an outlet of the induced draft tube assembly from the indoor ground by the controller according to the obtained values.
Referring to fig. 8, 9, 10 and 11, an adjustment model of the distance L and the height h is established, wherein the adjustment model h is (L/7.5) ^ (-1.25). The adjusting model is obtained based on numerical simulation, the hot air attaching distance of the air lake region is adjusted by adjusting the height of the air supply outlet from the ground, and different values are obtained according to the numerical simulation resultThe hot air attaching distance x of the air lake region under the air supply height h is obtained by fitting in origin software, and the relation between x and h is as follows: x is 7.5 x h (-0.8), h is from [1.1,3 ]](R20.99, where R2 is a deterministic coefficient, a statistic that measures fitness, R2The closer the value of (d) is to 1, the better the curve fit. ) The formula reflects the real and objective rule between the air supply height and the corresponding hot air attachment distance.
The logic in practical use is that the distance L between a user and the air outlet of the air conditioner is the value x which needs to be reached by hot air adhesion, so that the air supply height h which needs to be met by the air outlet of the air conditioner is reversely deduced according to the L. The relationship between L and h, i.e., the relationship between x and h, is replaced by L in the formula x ═ 7.5 ^ h (-0.8), yielding h ═ L/7.5 ^ (-1.25).
More specifically, when t is>At t1, feeding back to the controller as x at the current distance L0Remember that the value of h which caused the adjustment action last time is x1When x is0<x1When the air guide pipe assembly rotates upwards, the air guide pipe assembly rotates upwards; when x is0>x1, the induced draft tube assembly is translated and rotated downwards; when t is less than or equal to t1, the h value is not fed back to the controller.
Wherein the value of t1 is 3min < t1<5min, or 3.5min,4min, 5min and the like can be selected, and the setting is specifically carried out according to the actual requirement; the purpose of setting the time is to adjust the height of the outlet of the induced draft pipe assembly from the indoor ground by matching with the controller at any time within a certain time, so that the optimal utilization of energy is better realized.
Referring to fig. 7, in the specific working process, the human body recognition sensor 6 senses the position L of the human body away from the air port and the previous action time t away from the human body, the hot air attachment distance x in the air lake region is fed back to the controller (a single chip microcomputer is adopted in the embodiment) 7, the built-in program h of the controller is (x/7.5) ^ (1.25), the value of the air supply height h is fed back to the driver 8, the driver 8 controls the stepping motor 9 to rotate the bearing 10, the rotation of the bearing 10 drives the height of the corrugated hose 11, the height of the air supply opening away from the ground is adjusted to be h, and then the requirement that the attachment distance is x is.
When t is>At t1, feeding back to the controller as x at the current distance L0Remember that the value of h which caused the adjustment action last time isx1When x is0<x1When the air guide pipe assembly rotates upwards, the air guide pipe assembly rotates upwards; when x is0>x1, the induced draft tube assembly translates and rotates downwards; when t is less than or equal to t1, the h value is not fed back to the controller. Wherein t1 is 3min<t1<5min。
Specifically, the ventilation duct may adopt a corrugated hose 11, and the height of the corrugated hose 11 from the ground in a natural vertical state is 1.2 m. The setting of 1.2m corresponds to the distance in the normal operating state.
Example 4:
the embodiment is numerical simulation, the room size is 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, and the height of the air supply outlet from the ground is 2.4 m; the size of the air return inlet is 0.7m multiplied by 0.2m, the air supply speed is 5.24m/s, and the air supply temperature is 40 ℃. The attachment length was 3.8 m.
In connection with fig. 12, and also in fig. 13, the different shaded colors represent different temperatures, and the darker the color indicates the lower the temperature, see the upper temperature scale in the figure. The lower graph is a simulated cloud graph of mixed ventilation under the same working condition, and compared with the embodiment of the invention, the mixed ventilation has the advantages that the indoor is hot from top to bottom, the indoor is cold from top to bottom, the hot air can be directly sent to the lower part of the room in the invention, and the temperature of the lower part of the room is higher.
Example 5:
the present example was actually tested in a laboratory, room size: 7 m.times.5.2 m.times.2.7 m; the size of the air supply outlet is 0.64m multiplied by 0.05 m; the height of the air supply outlet from the ground is 2.3 m; the size of the air return inlet is 0.7m multiplied by 0.2m, the air supply speed is 5.20m/s, and the air supply temperature is 40 ℃. The actual attachment length was found to be 4.0m, and 77 minutes after start-up, the vertical temperature difference at the worst point in the room was 2.44 ℃.
Example 6:
the embodiment is numerical simulation, the room size is 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, and the height of the air supply outlet from the ground is 1.8 m; the size of the air return inlet is 0.7m multiplied by 0.2m, the air supply speed is 5.24m/s, and the air supply temperature is 40 ℃. The attachment length was 4.5 m.
Example 7:
the embodiment is numerical simulation, the room size is 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, and the height of the air supply outlet from the ground is 1.2 m; the size of the air return inlet is 0.7m multiplied by 0.2m, the air supply speed is 5.24m/s, and the air supply temperature is 40 ℃. The attachment length was 6.5 m.
Example 8:
the embodiment is numerical simulation, the room size is 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, and the height of the air supply outlet from the ground is 1.1 m; the size of the air return inlet is 0.7m multiplied by 0.2m, the air supply speed is 5.24m/s, and the air supply temperature is 40 ℃. The attachment length was 6.5 m.
Example 9:
the embodiment is numerical simulation, the room size is 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, and the height of the air supply outlet from the ground is 1.0 m; the size of the air return inlet is 0.7m multiplied by 0.2m, the air supply speed is 5.24m/s, and the air supply temperature is 40 ℃. The attachment length was 6.4 m.
Example 10:
the embodiment is numerical simulation, the room size is 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, and the height of the air supply outlet from the ground is 0.9 m; the size of the air return inlet is 0.7m multiplied by 0.2m, the air supply speed is 5.24m/s, and the air supply temperature is 40 ℃. The attachment length was 5.5 m.
Example 11:
the embodiment is numerical simulation, the room size is 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, and the height of the air supply outlet from the ground is 0.6 m; the size of the air return inlet is 0.7m multiplied by 0.2m, the air supply speed is 5.24m/s, and the air supply temperature is 40 ℃. The attachment length was 6.0 m.
Example 12:
the embodiment is numerical simulation, the room size is 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, and the height of the air supply outlet from the ground is 0.3 m; the size of the air return inlet is 0.7m multiplied by 0.2m, the air supply speed is 5.24m/s, and the air supply temperature is 40 ℃. The attachment length was 7.1 m.
Summary data from example 4 to example 12 are summarized as follows:
to sum up, the embodiment 4 to the embodiment 12 completely solve the problem that the air supply mode in the prior art is difficult to supply hot air to the personnel space. The hot air can be directly sent to the lower part of the room with low loss, the rising of hot air flow is effectively inhibited, and the good extending and diffusing effect of the hot air flow in the horizontal direction is ensured.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (11)
1. A hot air supply system, comprising: the indoor unit of the air conditioner is assembled on an indoor wall, an air return opening of the indoor unit of the air conditioner is communicated with an indoor space, an air outlet of the indoor unit of the air conditioner is assembled and connected with an air inducing pipe assembly, and an extension line of an outlet of the air inducing pipe assembly is perpendicular to the indoor ground.
2. The system of claim 1, wherein the draft tube assembly is mounted to an area above any wall of the room.
3. The hot air supply system according to claim 2, wherein the air inducing pipe assembly is a ventilation pipe, the ventilation pipe is of a telescopic structure, and the distance between the outlet of the ventilation pipe and the indoor floor is 1.1-3 m.
4. The hot air supply system according to claim 3, wherein an air supply surface formed by guiding the flow of the ventilation duct is larger than an air supply surface of an air outlet of the indoor unit of the air conditioner.
5. The hot air supply system according to claim 3 or 4, wherein a vertical distance between a central axis of the ventilation duct and the indoor wall is S, and a ratio of a width d of the air supply opening of the ventilation duct to the width d of the air supply opening satisfies 0.5-2.
6. The hot air supply system according to claim 3, wherein the ventilation duct comprises a rectangular tube, and one end of the tube is connected to the air outlet of the indoor unit of the air conditioner through an elbow.
7. The system of claim 1, wherein the system is equipped with a monitoring component and a controller, the monitoring component obtains the distance between the user and the indoor unit of the air conditioner and records the distance into the controller.
8. A hot air supply control method, comprising:
acquiring the distance between a current user and a blowing port of an indoor unit of an air conditioner, and setting the distance as L;
acquiring the activity time of the current user in an activity area, and setting the activity time as t;
and sending the numerical values of the distance L and the time t to a controller, and dynamically adjusting the height h of an outlet of the induced draft tube assembly from the indoor ground by the controller according to the obtained values.
9. The method according to claim 8, wherein an adjustment model of distance L and height h is established, and the adjustment model h is (L/7.5) ^ (-1.25).
10. A method according to claim 8 or 9, wherein when t is reached>At t1, feeding back to the controller as x at the current distance L0Remember that the value of h which caused the adjustment action last time is x1When x is0<x1When the air guide pipe assembly rotates upwards, the air guide pipe assembly rotates upwards; when x is0>x1, the induced draft tube assembly translates and rotates downwards; when x is0＝x1When the air guide pipe assembly is in use, the air guide pipe assembly is kept still; when t is less than or equal to t1, the h value is not fed back to the controller.
11. The method of claim 10, wherein the value of t1 is 3min < t1<5 min.
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| CN202010020063.9A CN111207446A (en) | 2020-01-09 | 2020-01-09 | Hot air supply system and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013869A (en) * | 2022-07-12 | 2022-09-06 | 珠海格力电器股份有限公司 | Carpet type wall hanging assembly, control method thereof and wall hanging machine |
| CN115095944A (en) * | 2022-05-31 | 2022-09-23 | 上海伯涵热能科技有限公司 | Whole house fresh air system with fan coil arranged adjacent to outer wall |
-
2020
- 2020-01-09 CN CN202010020063.9A patent/CN111207446A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115095944A (en) * | 2022-05-31 | 2022-09-23 | 上海伯涵热能科技有限公司 | Whole house fresh air system with fan coil arranged adjacent to outer wall |
| CN115013869A (en) * | 2022-07-12 | 2022-09-06 | 珠海格力电器股份有限公司 | Carpet type wall hanging assembly, control method thereof and wall hanging machine |
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